1.3 SERVICE
All warranty and non-warranty repairs must be returned freight
prepaid and insured to Patton Electronics. All returns must have a
Return Materials Authorization number on the outside of the shipping
container. This number may be obtained from Patton Electronics
Technical Service:
(301) 975-1007, http://www.patton.com
;
.
Packages received without an RMA number
will not be accepted.
Patton Electronics’ technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 2085. Technical Service hours:
8AM to 5PM EST, Monday
through Friday.
2
4.2.2 DAISY CHAIN TOPOLOGY
Using a daisy chain topology, you may connect several Model
2085s together in a master/slave arrangement. Maximum distance
between the units will vary based upon the number of drops, data rate,
wire gauge, etc. Call Technical Support for specific distance estimates.
Figure 8 (below) shows how to wire the two-pair cables properly for
a Model 2085 daisy chain topology. Note that the ground connection is
not needed.
4.3 CONNECTION TO THE RS-232 INTERFACE
Once you have properly configured the Model 2085 and connected
the twisted pair wires correctly, simply plug the Model 2085 directly into
the DB-25 port of the RS-232 device. Remember to insert and tighten
the two captive connector screws.
(Note: If you must use a cable to connect the Model 2085 to the
RS-232 device, make sure it is a
straight through
cable of the shortest
possible length—we recommend 6 feet or less).
4.4 OPERATING THE MODEL 2085
Once the Model 2085 is properly installed, it should operate
transparently—as if it were a standard cable connection. Operating
power is derived from the RS-232 data and control signals; there is no
“ON/OFF” switch. All data signals from the RS-232 and RS-485
interfaces are passed straight through. Additionally, one hardware flow
control signal is passed
in each direction
.
15
HOST
FIRST SLAVE
OTHER SLAVE(S)
XMT+---------------------RCV+ -----------------------RCV+
XMT- ---------------------RCV- -----------------------RCV-
RCV+---------------------XMT+ -----------------------XMT+
RCV- ---------------------XMT- -----------------------XMT-
Figure 8.
Daisy chain wiring for Model 2085 host and slaves
